netdev - Re: NMI lockup, 2.6.26 release

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080725073628.GA10399@ff.dom.local>
Date:	Fri, 25 Jul 2008 07:36:28 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	denys@...p.net.lb
Cc:	netdev@...r.kernel.org
Subject: Re: NMI lockup, 2.6.26 release

Hi Denys,

In case this is still working after hrtimer -> timer change here is
another patch for testing: to check if limiting hrtimers scheduling
could matter here. Btw. could you write what is the approximate
number of htb qdiscs and classes working on each device of this box
(including ifbs)?

Thanks,
Jarek P.

(This patch should be applided to 2.6.26 or .25 after reverting
the previous debugging patch.)

---

 net/sched/sch_htb.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 30c999c..ff9e965 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -162,6 +162,7 @@ struct htb_sched {
 
 	int rate2quantum;	/* quant = rate / rate2quantum */
 	psched_time_t now;	/* cached dequeue time */
+	psched_time_t next_watchdog;
 	struct qdisc_watchdog watchdog;
 
 	/* non shaped skbs; let them go directly thru */
@@ -920,7 +921,11 @@ static struct sk_buff *htb_dequeue(struct Qdisc *sch)
 		}
 	}
 	sch->qstats.overlimits++;
-	qdisc_watchdog_schedule(&q->watchdog, next_event);
+	if (q->next_watchdog < q->now || next_event <=
+	     q->next_watchdog - PSCHED_TICKS_PER_SEC / HZ) {
+		qdisc_watchdog_schedule(&q->watchdog, next_event);
+		q->next_watchdog = next_event;
+	}
 fin:
 	return skb;
 }
@@ -973,6 +978,7 @@ static void htb_reset(struct Qdisc *sch)
 		}
 	}
 	qdisc_watchdog_cancel(&q->watchdog);
+	q->next_watchdog = 0;
 	__skb_queue_purge(&q->direct_queue);
 	sch->q.qlen = 0;
 	memset(q->row, 0, sizeof(q->row));
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html